Electrical Transport and Magnetic Properties of Metal/Metal Oxide/Metal Junctions Based on Anodized Metal Oxides

Abstract

In this paper, we describe magnetoelectric properties of metal/metal-oxide/metal junctions based on anodized metal oxides. Specifically, we use Ti and Fe metallic layers separated by the porous metal-oxides of iron or titanium formed by the anodization method. Thus, we prepare double junctions with at least one ferromagnetic layer and measure magnetoresistance, as well as their current-voltage and magnetic characteristics. We find that magnetoresistance depends on that junction composition and discuss the nature of differential resistance calculated from I-V characteristics. Our findings show that a top metallic layer and the interface between this layer and anodized oxide, where strong interatomic diffusion is expected, have the strongest influence on this observed behavior.

Manipulating Electrical Properties of Nanopatterned Double-Barrier Schottky Junctions in Ti/TiOx/Fe Systems

“…The electrolytes were aged for 24 h to homogenize the solution and to slow the electrochemical etching/oxidation processes. We used three different anodization voltages of 5, 15, and 60 V, and anodization time was 45 min based on the results of our previous experiments. , After fabrication of anodized titanium oxide, the samples were covered with 50 nm of iron followed by 50 nm of gold. The protective gold layer prevented ambient oxidation and was simultaneously the top electrical contact.…”

“…21 In this paper, we describe a concept of the junctions with patterned oxide semiconductors and a magnetic layer of iron, the idea which was tested in our previous studies. 22,23 Metal/titanium oxide/metal junctions exhibit a wide range of electrical conducting properties, from insulating through semiconducting to Ohmic. These properties strongly depend on the metal and on the type of barrier formed at the metal/ TiO 2 interface.…”

“…The anodized titanium oxides are popular substrates for formation of nanopatterned thin films . In this paper, we describe a concept of the junctions with patterned oxide semiconductors and a magnetic layer of iron, the idea which was tested in our previous studies. , …”

Growth of the Nanostructured Titanium Oxide by Anodization of Ti/Cu/Ti System

“…Nanostructured titanium oxide garners significant attention due to its potential applications in biomedical coatings [1], supercapacitors [2], solar cells [3], catalysis [4], templates for magnetic thin films [5], and spintronic devices [6,7]. This attention stems from the large surface-to-volume ratio in titanium oxide, its high surface activity accompanied by high sensitivity, and unique electronic structure.…”

Hydrothermal synthesis of polyaniline nanospheres coupled with graphene oxide for enhanced specific capacitance performances

“…Current SP electrode materials are mainly conductive polymers (CPs), 7 carbon materials, 8 and metal oxides. 9 CPs electrode materials include polyaniline (PANI), 10 polypyrrole (PPy), 11 and polythiophene (PTh) 12 . Among them, PANI has excellent properties, including good electrical conductivity, 13 high chemical activity, and easy synthesis.…”